Question

of the co2 that has been emitted to the atmosphere as a result of human activities since the start of the industrial revolution, approximately what percentage is currently in the atmosphere?
a. 90
b. 75
c. 25
d. 50

Explanation:

Scientists estimate that about 50% of the CO2 emitted to the atmosphere as a result of human - activities since the start of the industrial revolution remains in the atmosphere. The rest has been absorbed by the oceans and terrestrial ecosystems.

Answer:

D. 50